Pack of transfer sheets



April 14, 1942- J. WILKES, JR 2,279,855

PACK OF TRANSFER SHEETS Filed March 22, 1940 a 4, C/ 4 E1 5.

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Patented Apr. 14, 1942 mee- PACK OF TRANSFER SHEETS James Wilkes, .in, Wolverhampton," England Application March '22, 1940, Serial No. 325,421 in Great Britain March 25, 1939 3 Claims.

the backing sheet with the individual ends of each bar stitched or fixed to the edges of the backing sheet or with the ends of each individual bar turned around the edges of the backing sheet and fixed by adhesive to the back face of the backing sheet and transfer packs also have incorporated a guide and stop device fixed to the rear end of the backing sheet through which the continuous sheets is'threaded and which is adapted to wedge behind the platen roller of a typewriter, or tofix a bail member for forming a guide and for co-acting with stop hooks on a fitting fixed to the typewriter, but such prior constructions of guide and stop devices lack simplicity of construction and ease of combining with the backing sheet.

An object of the present invention, is to provide means for attaching the transfer sheets to the backing sheet which is extremely simple to manufacture and simple to attach to the backing sheet.

A further object of the present invention is to facilitate the correct and simple assembly of the transfer sheets on the backing sheet.

A still further object is to provide an-extremely simple form of guide and stop device which is securely fixed to the backing sheet without the necessity of gripping the device directly to the material forming the backing sheet.

The invention is illustrated in the accompanying drawing, of which:

Figure l is a face value-of a complete pack of transfer sheets constructed according to this invention, showing parts of the transfer sheets broken away.

Figure 2 is a section on line II-II of Figure 1,

Figure 3 is a section on line III-III of Figure 1.

Figure 4 is a view of the transfer sheet carrying strip or bar detached.

Figure 5 is a back view of the complete pack,

of transfer sheets and Figure 6 is a perspective view of the stop and guide device detached.

Referring to the drawing, the carbon or transfer pack comprises a backing sheet I of strong flexible paper or suitable material. A strip 2 of any suitable flexible material of greater length than the width of the backing sheet has a. num-- fastened down to form a loop I3.

inturned end l2. this looped stop and guide member is adapted to berof slits 3or slots formed longitudinally therealong, the length of the slits or slots being equal to the width of the sheet. The strip is arranged transversely across the backing sheet and a margin 4 of material which is not slit or slotted is thus left at each side of the strip. This margin of material is folded around thebacking sheet and fixed, such as by an adhesive, to the rear face thereof. Before the strip of material is fixed to the backing sheet the carbon ortransfer sheets 5 are fixed to the bars 5 of material between the slits, so that the inner ends 'of the carbons are arranged in steppedv relationship and so that the sheets of. the continuous stationery can bethreaded' therethrough in a simple manner; The strip of material 2 having the slits therein can be formedof paper reinforced by a fabric mesh backing or otherwise formed of material which is less liable to tear than the backing sheet, thereby giving additional strength and preventing the liability of damage when threading the stationery through the pack or' when the pack is in use. The carbon sheets can be very conveniently fixed to the strip of ma terial before it is attached to the backing sheet. The parallel bars 6 can be thus very cheaply produced and are automatically arranged in parallel relationship. The transfer sheets can also be very easily arranged superimposed in alignment. The assembled transfer sheets are very quickly and accurately fixed on the back-- ing sheet as a single unit and only a single end at each side is required to be fixed by adhesive.

The complete assembly of the pack is therefore very quickly and accurately assembled. As the ends of the bars 5 are all an integral part oil the end fixing pieces 4 there is no liability of the ends of the bars getting'out of position and the liability of breaking the bars at the ends will be reduced to a minimum. The simplicity of the construction adds to its great efiiciency in use.

The backing sheet I is extended beyond the rear of the carbon sheets 5 andthe rear end of this extended portion is bent back on itself and A strip of spring steel or other suitable flexible material is bent into a U-shaped member and the free ends are adapted to be detachably fixed together to form a closed loop. Conveniently the free ends of the limbs l and 8 are inturned and adapted to overlap one another and a pin 9 or projection on one end IE) is adapted to 'be spring held in engagement with a perforation H in the other The longitudinal limb 7 of The stop and guide member can therefore be fixed on the backingsheet after the continuous stationery has been interleaved, with the carbon sheets.

In use, when one sheet offorms have been typed and it is required to pull the continuous stationery through the carbon sheets, the stop and guide member is adapted to be moved to engage behind the platen roller of the typewriter, so thatthe carbon pack is retained by the typewriter, enabling the continuous sheets to be pulled through the carbon sheets, and the thickness of the stop device is such that it forms a wedge stop behind the platen roller of the typewriter. As the device has a'plain exterior surface there are no projecting parts which will catch in the typewriter and the wall of I the chute formed'by the device is continuous so that no obstacles for the free movement of the continuous sheets is presented.

' The stop and guide member forms a rigid guide which keeps the continuous sheets in correct position in relation tothe manifold copy device and there is no liability of the continuous sheets becoming detached from the guide. The guide also gives rigidity'to the rear of the extension sheet and ensures an efficient feed to the typewriter. The backing sheet lying against the limb 1 ensures that the' backing sheet will be clamped against the platen roller and there will be no liability of tearing the backing sheet when the stop and guide device is wedged behind the platen roller."

Iclaim: I 1. Apack of ble backing sheet carrying a set of transfer sheets, a guide and stop device formed of astrip of stiff materialformedinto a U-shaped configuration; one'limb of which is threaded through a loop in the rear of the backing sheet and the v width of the strip being such that the passage between the limbs is maintained parallel with transfer sheets comprising a flexithe adjacent face of the backing sheet and inturned ends of the limbs being secured together to close the open end of the guide and stop device at a distance apart for receiving continuous sheets and for forming a stop of sufficient thickness for engaging behind the platen roller of a typewriter to'hold the pack of transfer sheets whilst the continuous sheets are pulled therethrough.

2; A pack of transfer sheets comprising a backing sheet of flexible material, a strip of flexible material, extending across the front of the backing sheet having slits longitudinally along the strip and extending from a distance from one which the transfer sheets are attached andhav end to a distance from the other end to divide the strip into a number of transverse bars to ing unslit; portions at each end which are folded around the edges of the backing sheet and fixed by an adhesive to the back of such sheet, and

a guide and stop device formed of a strip of springy material formed into a U-shaped con-' figuration, one limb of which is engaged through a closed loop in the rear end of the backing sheet and the width of the material of the said limb being such that the passage between the limbs is maintained parallel with the adjacent face of the backing sheet by engagement with the said loop and means for securing together the ends of the limbs comprising a pin on an inturned end of one limb engaging a perforation in an 'inturned end of the other limb, such securing means holding the limbs at a distance apart for receiving the continuous stationery and forming a stop of sufficient thickness for engaging behind the platen roller of a typewriter to hold the pack of transfer sheets whilst the continuous stationery is drawn therethrough.

3. A pack of transfer sheets comprising a backing sheet and a strip of flexible material extending across the front of the backing sheet and having longitudinally slits extending from a dis-, tance from one end to a distance from the other end to divide the strip into a plurality of transverse bars, and which strip of flexible material is folded at the ends of the slits and the unslit portion is fixed by an adhesive to the back face of the backing sheet so that the said transverse bars extend across the full width of the backing sheet,

bars.

JAMES WILKES, JUNIOR; 

